The Kingdom of Mustang in the northern part of Nepal is open to tourists already for quite some time using the trekking route via Jomosom in the Kali Gandaki valley. In recent years a new route has been introduced which is following the Annapurna Circuit route up to Koto where it turns north into the Naar valley. After crossing the Teri La Pass the high-altitude desert of Mustang and its main town Lo Manthang is reached. The first part of this trek from Bhulbhule to Koto takes about three days.